diff --git a/functions/handlers/post.js b/functions/handlers/post.js
index b41a470..47af9c0 100644
--- a/functions/handlers/post.js
+++ b/functions/handlers/post.js
@@ -75,7 +75,10 @@ exports.getFilteredPostsOnTopics = (req, res) => {
     // get topics that user follows
     // make a set storing all topics
     // for each post, make a set of topics and if A and B != 0, you can display post
-    var topics = admin.firestore().collection('users').where('userHandle', '==', req.userHandle)
-    var query = admin.firestore().collection('posts');
+    var queryTopics = admin.firestore().collection('users').where('userHandle', '==', req.userHandle)
+    var topics = new Set();
+    topics.add(queryTopics.get().microBlogTopics)
+    
+    var queryPosts = admin.firestore().collection('posts');
 
 }
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